import numpy as np
 
a = np.arange(12).reshape(3,4)
 
print ('原数组：')
print (a)
print ('\n')
 
print ('转置数组：')
print (a.T)


import numpy.matlib 
import numpy as np
 
print (np.matlib.empty((2,2)))
# 填充为随机数据




import numpy.matlib 
import numpy as np 
 
print (np.matlib.zeros((2,2)))